M. Valentine, Theoretical Ethics
“ Personal temperament, acquired character, or external conditions may make the feeling greater or less. The mental organization of some persons is more emotional. Education may have given a peculiar development. Temporary circumstances may heighten the excitation. But other things being equal the degree of positiveness in the moral emotions is generally dependent on two things: (a) the clearness with which the moral distinction and the consequent obligation is discerned, and (b) the pureness and tenderness of the person's moral nature. ”
